EP3971406B1 - Combustion chamber section with integrated baffle and method for manufacturing a combustion chamber section - Google Patents

Description

The invention relates to a combustion chamber section with an integrated baffle, a combustion chamber and a rocket engine with such a combustion chamber section, and a method for producing such a combustion chamber section, as well as a computer-readable data carrier with instructions for carrying out the manufacturing process. In particular, the invention relates to a combustion chamber section, with a combustion chamber body which is formed in one piece with a guide plate projecting into the interior of the combustion chamber. Furthermore, a combustion chamber and a rocket engine with such a combustion chamber section and a layer structure process for producing such a combustion chamber section as well as a computer-readable data carrier with instructions for carrying out the layer structure process are described.

Combustion chambers of liquid rocket engines are used to efficiently burn the respective fuel pairing consisting of oxidizer and fuel. For this purpose, the fuel components are supplied to the chamber via a special injection system. Depending on the respective operating conditions, evaporation, mixing and chemical conversion and the beginning conversion into kinetic energy then take place in the chamber, the main increase of which lies in the area of a subsonic and supersonic nozzle area. The flow in the area of the combustion chamber is characterized by turbulent mixing. For reliable operation of the rocket engine, high combustion stability is desirable.

Furthermore, cooling is necessary, particularly in the area of the hot gas walls (inner walls of the combustion chamber and exhaust nozzle). For example, in the case of regenerative cooling, the high heat development can be dampened via coolant channels in the hot gas walls through which at least one fuel component flows.

From the various shapes for combustion chambers, such as spherical, pear-shaped, conical, cylindrical or in the form of an annular combustion chamber, the cylindrical combustion chamber configuration has become established. A cylindrical combustion chamber has advantages, particularly in production. However, combustion chambers with a round cross-section have an increased susceptibility to high-frequency vibrations, especially transverse vibration modes, which correspond to the natural frequencies of these designs. These transverse vibrations, i.e. vibration propagation in the radial direction of the round combustion chamber, lead to an additional release of energy in the combustion chamber with associated overheating. There is also a strong pressure fluctuation.

In order to counteract or avoid these vibrations, baffles (also known as "baffles") were arranged on the head plate (or injection plate) of the combustion chamber. In the DE 10 2016 209 650 A1 It is proposed, instead of baffles, to provide a certain number of coaxial injection elements on the head plate with a central sleeve body that protrudes further from the head plate into the interior of the combustion chamber than the other injection elements. The resulting axial staggering of the flame front in the combustion chamber reduces or prevents the formation and/or propagation of vibrations in a similar way to baffles.

US3200589 , US3242670 and US3413810 show a combustion chamber section according to the prior art.

Against this background, the present invention is based on the object of creating a structurally simpler option for reducing transverse vibrations in the combustion chamber.

This object is achieved by a combustion chamber section with the features of claim 1, a combustion chamber with the features of claim 10, a rocket engine with the features of claim 11 and a method with the features of claim 12 and a corresponding data carrier with instructions according to claim 13.

According to a first aspect for better understanding of the present disclosure, a combustion chamber section for a combustion chamber of a rocket engine includes a combustion chamber body that encloses a combustion chamber volume and in which coolant channels are arranged. The combustion chamber body can consist of an outer shell and an inner shell, between which webs or similar separating elements are arranged, which divide a space between the two shells into coolant channels. For example, fuel can flow through the coolant channels, which heats up favorably for later combustion and at the same time cools the combustion chamber body, in particular the inner shell.

It will a cylindrical combustion chamber body is used. Alternatively, the combustion chamber body has a polygonal (triangular, quadrangular, pentagonal or with an even higher number of corners and sides) or elliptical cross section.

The combustion chamber section further comprises at least one baffle, which is formed in one piece with the combustion chamber body and projects from the combustion chamber body into the interior of the combustion chamber (the combustion chamber). By arranging the at least one guide plate on the inside of the combustion chamber body, the structure of the injection head and in particular the injection plate for the combustion chamber is significantly simplified. Since a large number of injection elements are provided in the injection plate, which must be supplied with at least two fuel components, their structure is usually quite complex and time-consuming. The additional attachment of baffles or a number of specially shaped injection elements, as with conventional injection plates, increases the amount of work and thus the associated manufacturing costs. The combustion chamber body described here, on the other hand, enables the injection head and combustion chamber to be manufactured more simply overall.

Formed in one piece here means that the at least one baffle and the combustion chamber body consist of a coherent material. For example, the combustion chamber section, i.e. the combustion chamber body with integrated at least one baffle, can be manufactured in a layer construction process (also referred to as 3D printing or ALM - additive layer manufacturing). Also, only parts of the combustion chamber body and/or baffle can be manufactured using a layer construction process and built on a section of the combustion chamber body and/or baffle that has been manufactured in another way. Different materials can also be used in the layered construction process. For example, a more heat-resistant material can be used on the radially inner sides and ends of the at least one baffle than on an outside of the combustion chamber body.

The combustion chamber body and the baffle can also be manufactured separately from one another and then attached to one another. This can be done, for example, by welding, soldering and/or (layer-by-layer) melting.

In addition, the at least one baffle can comprise at least one coolant channel, which is fluidly connected to at least one of the coolant channels in the combustion chamber body. By arranging a coolant channel in the at least one baffle, it can be actively cooled, thereby greatly increasing the longevity of the baffle. Since coolant channels are already provided in most combustion chambers To cool the combustion chamber body, the fluidic connection to the coolant channel of the baffle is easy to establish. For example, at least one coolant channel running in the longitudinal direction of the combustion chamber can be fluidly connected to the at least one coolant channel in the baffle.

In one embodiment variant, the baffle can have a coolant inlet and a coolant outlet. A coolant inlet and coolant outlet here means that the corresponding coolant channel forms an opening on a cut side of the baffle. Since the baffle is made in one piece with the combustion chamber body, a cut side of the baffle here means an imaginary interface of the baffle at the border to the combustion chamber body if, for example, the baffle were separated from the combustion chamber body.

Furthermore, the at least one coolant channel of the baffle can run between the coolant inlet and the coolant outlet. Thus, the coolant inlet and the coolant outlet can be arranged at different positions of the baffle (and/or the combustion chamber section), while the at least one coolant channel of the baffle runs inside the baffle.

In a further embodiment variant, the coolant inlet of the baffle can be fluidly connected to the at least one of the coolant channels in the combustion chamber body. For example, when producing the combustion chamber section using a layer construction process, there is no actual opening in the baffle. Rather, a volume built up in the interior of the baffle and forming the coolant channel in the baffle will merge into a volume forming the coolant channel in the combustion chamber body during the layer construction process. In other words, the coolant channel in the combustion chamber body can merge into the coolant channel of the baffle, so that coolant flows through the interior of the baffle after flowing through the combustion chamber body and actively cools it.

In yet another embodiment variant, each of the coolant channels in the combustion chamber body can have a coolant outlet. When looking at the combustion chamber section, this can be an actual opening from which coolant can flow out after flowing through the combustion chamber body.

For example, a further coolant outlet of a coolant channel in the combustion chamber body can be arranged in the circumferential direction along a cross section of the combustion chamber body next to one of the coolant outlets.

At locations where a baffle is provided, the coolant outlet of the baffle can be arranged next to one of the coolant outlets of a coolant channel in the combustion chamber body. In other words, the coolant outlet of the baffle is located in the circumferential direction at a position that would correspond to a coolant outlet of a coolant channel in the combustion chamber body if no baffle with its own coolant channel were provided at this position. The coolant channels in the combustion chamber body and the baffle can be dimensioned in the circumferential direction such that an integral number of coolant channels in the combustion chamber body corresponds to the width of the baffle in the circumferential direction. The combustion chamber section can therefore be designed at its end with the coolant outlets like conventional combustion chambers without integrated baffles. This means that the combustion chamber section can also be used with conventional injection heads and injection plates.

In one embodiment variant, a coolant channel in the combustion chamber body can end in the longitudinal direction of the combustion chamber body at the level of the coolant inlet of the baffle and open into the at least one coolant channel of the baffle. In other words, a coolant channel in the combustion chamber body at positions where a baffle is integrated can be designed to be shorter in the longitudinal direction of the combustion chamber body than the remaining coolant channels in the combustion chamber body, which do not overlap with a baffle. This allows additional material to be provided on the combustion chamber body for fastening/integrating the baffle. Cooling of the combustion chamber body at the position at which the baffle is arranged is not necessary since the baffle itself is actively cooled.

In a further embodiment variant, a first coolant channel in the guide plate can be a coolant supply channel which is fluidly connected to the at least one coolant channel in the combustion chamber body. Furthermore, the first coolant channel in the baffle can run on a first side of the baffle. In addition, a second coolant channel in the baffle can be a coolant discharge channel that runs on a second side of the baffle. The first and second sides of the baffle may be opposite sides of the baffle. For example, they can be viewed as essentially opposite sides of the baffle in the longitudinal direction of the combustion chamber section. Alternatively, they can also be viewed as essentially opposite sides of the baffle in the circumferential direction of the combustion chamber section.

The first coolant channel can open into or merge into the second coolant channel, so that the first and second coolant channels form a continuous volume and the first and second sides of the baffle are cooled.

Alternatively or additionally, at least one third coolant channel can fluidly connect the coolant supply channel to the coolant discharge channel. The third coolant channel can be arranged on a third side of the baffle, so that the third side is also cooled. The third side can be a side of the baffle lying between the first and second sides of the baffle. Of course, the third coolant channel can be arranged at any position within the baffle, for example in the middle of the baffle. A plurality of third coolant channels may extend at any location within the baffle, including a coolant channel along the third side of the baffle.

In the present description of a coolant channel along one side of the baffle, what is meant is the arrangement of the coolant channel in the edge region of the baffle. In other words, the coolant channel is located relatively just below an outer surface of the baffle, so that this surface is sufficiently cooled. The material of the baffle, which delimits an inside of the coolant channel, serves to ensure the stability of the baffle. "Relatively just below an external surface" here means a wall thickness of the baffle between the external surface and the coolant channel that is sufficiently stable and heat-resistant to be arranged inside the combustion chamber.

In yet another embodiment variant, a plurality of baffles can be formed in one piece on the combustion chamber body and protrude into the interior of the combustion chamber. Furthermore, all of the plurality of baffles may be connected at their inner end by an annular baffle (also referred to as an inner baffle). Here, annular baffle does not only mean a round shape. Rather, the shape of the annular baffle can correspond to the cross-sectional shape of the combustion chamber body in the area of the baffles. Such a baffle arranged inside the cross section of the combustion chamber body also serves to reduce or avoid transverse vibrations.

In one embodiment variant, the annular baffle can comprise at least one coolant channel which is fluidically coupled to the at least one coolant channel of the plurality of baffles. Alternatively, the coolant channel of the annular baffle can have one or more coolant channels of one or more several of the plurality of baffles can be fluidically coupled. This allows the inner, ring-shaped baffle to be actively cooled.

In a further embodiment variant, the at least one coolant channel of the annular guide plate can comprise a coolant outlet which is arranged either on a side facing away from the combustion chamber or on a side facing the combustion chamber. Alternatively, a coolant outlet can also be provided on the side facing away from and facing the combustion chamber. In the case of a coolant outlet on the side facing away from the combustion chamber, the inner baffle can be designed so that it rests on the injection plate of the injection head. This allows the coolant outlet of the inner baffle to be used as a supply line for fuel (which usually represents the coolant) into the combustion chamber head. In the case of a coolant outlet on the side facing the combustion chamber, the coolant outlet can be designed as an injection element or can be set up to arrange an injection element therein. The inner baffle can therefore also be designed as an injection element that projects into the combustion chamber.

According to a second aspect for better understanding of the present disclosure, a combustion chamber for a rocket engine comprises a combustion chamber section according to the first aspect or one of the embodiment variants described therefor.

According to a third aspect for better understanding of the present disclosure, a rocket engine comprises a combustion chamber section according to the first aspect or one of the embodiment variants described therefor or comprises a combustion chamber according to the second aspect.

According to a fourth aspect for better understanding of the present disclosure, a method for producing a combustion chamber section according to the first aspect or one of its design variants comprises a layer construction method, wherein the combustion chamber section is constructed using a layer construction method. In particular, no material can be joined together by the layer construction process at positions where the coolant channels of the combustion chamber body and the at least one coolant channel of the baffle are located.

According to a fifth aspect for better understanding the present disclosure, a computer readable medium includes instructions that, when executed on a processor, cause a machine to perform the layer building method according to the fourth aspect. With these Instructions may be CAD data or similar data that describes or defines the shape of the combustion chamber section according to the first aspect and/or the combustion chamber according to the second aspect, in particular such that a machine shapes the combustion chamber section and/or the combustion chamber in layers can.

The configurations and variants described above can of course be combined without this being explicitly described. The present disclosure is therefore not limited to the individual embodiments and variants in the order described or to a specific combination of the aspects and embodiment variants.

Figur 1

schematisch eine perspektivische Ansicht einer Brennkammer zeigt;

Figur 2

schematisch einen Ausschnitt eines Brennkammerabschnitts zeigt; und

Figur 3

schematisch einen Ausschnitt eines Brennkammerabschnitts mit ringförmigem Leitblech zeigt.

Preferred embodiments of the invention will now be explained in more detail with reference to the accompanying schematic drawings, where:

Figure 1

schematically shows a perspective view of a combustion chamber;

Figure 2

schematically shows a section of a combustion chamber section; and

Figure 3

schematically shows a section of a combustion chamber section with an annular baffle.

Figure 1 schematically shows a perspective view of a combustion chamber 100, which can be used, for example, in a rocket engine 10. The nozzle of rocket engine 10 is in Figure 1 only indicated with dashed lines. The combustion chamber 100, as shown in Figure 1 shown in simplified form, includes a combustion chamber section 110 in which much of the mixing and combustion of the fuel components takes place. Downstream (in the direction of flow of the combustion gases), the combustion chamber section 110 is adjoined by a subsonic nozzle section 112, in which the combustion gases are accelerated, followed by a supersonic nozzle segment 114.

In the area of the nozzle supersonic segment 114 there is a connection 131 for coolant, which opens into a distribution ring 132 (also called a distributor manifold). The distribution ring 132 extends in the circumferential direction and forms a continuous annular volume. Coolant channels 130 open into this volume or viewed in the flow direction of the coolant (in Figure 1 shown by a dashed arrow), a plurality of coolant channels 130 begin in the distribution ring 132.

The combustion chamber section 110 consists of a combustion chamber body 120 which encloses a combustion chamber volume and in which the coolant channels 130 are also arranged. The in Figure 1 Combustion chamber section 110, shown cylindrically, can assume any cross-sectional shape that serves to efficiently burn the fuel components. The combustion chamber section 110 further comprises at least one baffle 140 which is formed in one piece with the combustion chamber body 120 and projects from the combustion chamber body 120 into the interior of the combustion chamber.

A flange 125 is provided at the end of the combustion chamber section 110 located upstream in the direction of flow of the combustion gases. This flange 125 is used to connect the injection head (not shown). As in the detailed view in the Figure 1 is shown, there are a plurality of coolant outlets 138 in the area of the flange 125, each coolant channel 130 in the combustion chamber body 120 having such a coolant outlet 138. The coolant outlets 138 are arranged next to one another in the circumferential direction along a cross section of the combustion chamber body 120. The coolant outlets 138 can open into a distribution ring or collecting ring, not shown, which is provided at the other end of the combustion chamber 100 corresponding to the distribution ring 132.

Like the detailed view in particular Figure 1 can be removed, at least one of the baffles 140 has a coolant channel 133 - 135 in order to cool the baffle 140. The coolant channel 133 - 135 is fluidly connected to at least one of the coolant channels 130 in the combustion chamber body 120.

Figure 2 shows schematically a section of a combustion chamber section 110, in particular the coolant channels 130 in the combustion chamber body 120 and the coolant channels 133 - 135 in the baffle 140 can be seen. The baffle 140 is shown as a trapezoidal shape only as an example, but can take any shape in order to dampen vibrations within the combustion chamber section 110. The baffle 140 divides the combustion chamber volume into different sections, whereby vibrations are suppressed or at least dampened. Depending on the type of fuel, the vibrations can have different parameters, so that the guide plate 140 must be dimensioned accordingly in the longitudinal direction and/or circumferential direction of the combustion chamber section 110 in order to dampen or suppress the vibrations that would otherwise arise.

This in Figure 2 Baffle 140 shown as an example has a coolant inlet 136 and a coolant outlet 137. The at least one coolant channel 133 - 135 of the guide plate 140 runs between the coolant inlet 136 and the coolant outlet 137. For example, the coolant inlet 136 of the baffle 140 can be fluidly connected to at least one of the coolant channels 130 in the combustion chamber body 120. In a simple embodiment, as in Figure 2 As shown, the baffle has a width in the circumferential direction of the combustion chamber body 120 that is slightly larger than the width of a coolant channel 130 in the combustion chamber body 120. The coolant channels 133 - 135 in the baffle 140 can therefore have a width in the circumferential direction of the combustion chamber body 120. which is approximately equal to the width of a coolant channel 130 in the combustion chamber body 120. In particular, the cross-sectional area of the coolant channel 130 in the combustion chamber body 120 can correspond to the cross-sectional area of the coolant channel 133 or the coolant inlet 136 in the baffle 140.

The coolant inlet 136 of the baffle 140 can be fluidly connected to the at least one of the coolant channels 130 in the combustion chamber body 120. As in Figure 2 can be seen, the coolant channel 130 in the combustion chamber body 120 ends in the longitudinal direction of the combustion chamber body 120 at the level of the coolant inlet 136 of the baffle 140, so that the coolant channel 130 in the combustion chamber body 120 opens into the coolant channel 133 in the baffle 140. In contrast, when viewed in the longitudinal direction of the combustion chamber body 120, the adjacent coolant channels 130 in the combustion chamber body 120 are longer.

The coolant outlets 138 of each coolant channel 130 in the combustion chamber body 120 lie next to one another in the circumferential direction of the coolant body 120. In the area of the baffle 140, where the coolant channel 130 in the combustion chamber body 120 is shorter, the coolant outlet 137 of the baffle 140 is arranged adjacent to a coolant outlet 138 in the combustion chamber body 120. As a result, all coolant channels 130 in the combustion chamber body 120 and also the coolant channels 133 - 135 in the baffle 140 open into the collecting ring (not shown), as would be the case with a large number of coolant channels 130 in the combustion chamber body 120 without a baffle 140. The collecting ring and the components connected to it therefore do not need to be changed.

In order to achieve sufficient cooling of the baffle 140, this looks like Figure 2 Baffle 140 shown has a first coolant channel 133, which is a coolant supply channel. The coolant supply channel 133 is fluidly connected to the (shorter) coolant channel 130 in the combustion chamber body 120. A second coolant channel 134 in the baffle 140 forms a coolant discharge channel and opens into the coolant outlet 137 of the baffle 140. The coolant supply channel 133 and the coolant discharge channel 134 are fluidly connected to each other. For example, they can be connected to one another via at least a third coolant channel 135. The greater the number of at least one third coolant channel 135, the more evenly coolant can flow through the guide plate 140 and the more evenly it is cooled.

Since the free tip of the baffle 140, which is furthest away from the combustion chamber body 120, projects furthest into the combustion chamber, this tip is also exposed to the highest heat load. In order to continue to achieve uniform cooling, the distance between two third coolant channels 135 can become smaller as the distance from the combustion chamber body 120 increases.

In order to also cool the outer sides of the baffle 140 (viewed in the flow direction of the combustion gases), the coolant supply channel 133 can run along a first side of the baffle 140 and the coolant discharge channel 134 can run along a second side of the baffle 140. Of course, the arrangement and course of the coolant channels 133 - 135 can be chosen differently from the courses shown so that the coolest possible coolant is guided past the expected hottest points of the baffle 140.

Figure 3 shows schematically a section of a combustion chamber section 110 with an annular baffle 150. Both the combustion chamber section 110 and the annular baffle 150 are shown circular. Of course, the annular baffle 150 can also take on a different shape, for example a polygonal shape. This annular baffle 150 also divides the combustion chamber volume, thereby dampening or avoiding vibrations.

The annular baffle 150 can also include at least one coolant channel 151, wherein in Figure 3 For example, two coolant channels 151 are shown on opposite sides (viewed in the flow direction of the combustion gases) of the annular baffle 150. This at least one coolant channel 151 in the annular baffle 150 can be fluidically coupled to at least one coolant channel 133 - 135 in at least one of the baffles 140, so that coolant can flow from at least one of the baffles 140 into the annular baffle 150 in order to close the annular baffle 150 cool.

Optionally, at least one of the coolant channels 151 of the annular baffle 150 can include a coolant outlet 152, 153. Such a coolant outlet 152, 153 of the annular baffle 150 can either be on be arranged on a side facing away from the combustion chamber 100 or on a side facing the combustion chamber 100. The coolant outlet 152 facing away from the combustion chamber 100 can be used as a coolant connection to direct coolant into the injection head. However, a coolant outlet 153 arranged on the side of the guide plate 150 facing the combustion chamber 100 can be used as an injection element. For example, an injection element can be installed or integrated in the coolant outlet 153, whereby coolant (here a fuel component) can be directed into the combustion chamber 100 in an area spaced from the injection plate (not shown).

Also optionally, coolant outlets (not shown) can also be arranged in the baffles 140. These coolant outlets can also be arranged on a side facing away from the combustion chamber 100 or on a side facing the combustion chamber 100 and fulfill the same functions as the coolant outlets 152, 153.

Out of Figures 2 and 3 It can be seen that the combustion chamber section 110 (or the entire combustion chamber 100) can be manufactured quite quickly and easily in a layered construction process (3D printing or ALM). The material forming the baffle 140 and/or annular baffle 150 can be applied in layers with the combustion chamber body 120 and the entire combustion chamber section 110 can be produced in layers. All coolant channels 130, 133, 134, 135, 151 can be produced by omitting a material application and thus creating a cavity. The layer construction process allows the different and possibly branched cavities that form the coolant channels 130, 133, 134, 135, 151 and coolant outlets 137, 138, 152, 153 to be produced in a simple manner. This makes it possible to create complex structures, particularly in the area of the baffles 140, 150, which would not be possible with other manufacturing processes. Thus, baffles 140, 150 that are easy to cool can be provided in a simple manufacturing process, and in particular good vibration damping can be achieved, regardless of a complicated course of the coolant channels 130, 133, 134, 135, 151.

Claims (13)

1. A combustion chamber section (110) for a combustion chamber (100) for a rocket engine (10), wherein the combustion chamber section (110) comprising:

   - a combustion chamber body (120) which encloses a combustion chamber volume and in which coolant channels (130) are arranged, wherein the combustion chamber body (120) is cylindrical or has a polygonal or elliptical cross-section, and wherein the combustion chamber body (120) is adapted to be connected to an injection head,
   characterised by

   - at least one baffle (140), which is formed integrally with the combustion chamber body (120), arranged on an inner side of the combustion chamber body (120) and projects from the combustion chamber body (120) into the interior of the combustion chamber,

   wherein the at least one baffle (140) comprises at least one coolant channel (133 - 135) which is fluidically connected to at least one of the coolant channels (130) in the combustion chamber body (120).
2. The combustion chamber section (110) according to claim 1, wherein the baffle (140) has a coolant inlet (136) and a coolant outlet (137), and wherein the at least one coolant channel (133 - 135) of the baffle (140) extends between the coolant inlet (136) and the coolant outlet (137).
3. The combustion chamber section (110) according to claim 2, wherein the coolant inlet (136) of the baffle (140) is fluidically connected to the at least one of the coolant channels (130) in the combustion chamber body (120).
4. The combustion chamber section (110) according to claim 2 or 3, wherein each of the coolant channels (130) in the combustion chamber body (120) has a coolant outlet (138), and wherein a further coolant outlet (138) of a coolant channel (130) in the combustion chamber body (120) or the coolant outlet (137) of the baffle (140) is arranged in the circumferential direction along a cross-section of the combustion chamber body (120) next to one of the coolant outlets (138).
5. The combustion chamber section (110) according to one of claims 2 to 4, wherein a coolant channel (130) in the combustion chamber body (120) ends in the longitudinal direction of the combustion chamber body (120) at the level of the coolant inlet (136) of the baffle (140) and opens into the at least one coolant channel (133 - 135) of the baffle (140).
6. The combustion chamber section (110) according to any one of claims 1 to 5, wherein a first coolant channel (133) in the baffle (140) is a coolant supply channel that is fluidically connected to the at least one coolant channel (130) in the combustion chamber body (120) and extends on a first side of the baffle (140), and wherein a second coolant channel (134) in the baffle plate (140) is a coolant discharge channel which extends on a second side of the baffle plate (140), and wherein preferably at least one third coolant channel (135) fluidically connects the coolant supply channel (133) to the coolant discharge channel (134).
7. The combustion chamber section (110) according to any one of claims 1 to 6, wherein a plurality of baffles (140) protrude into the interior of the combustion chamber, and wherein all of the plurality of baffles (140) are connected at their inner end by an annular baffle (150).
8. The combustion chamber section (110) according to claim 7, wherein the annular baffle (150) comprises at least one coolant channel (151) which is fluidically coupled to the at least one coolant channel (133-135) of the plurality of baffles (140).
9. The combustion chamber section (110) according to claim 8, wherein the at least one coolant channel (151) of the annular baffle (150) comprises a coolant outlet (152, 153), which is preferably arranged either on a side facing away from the combustion chamber or on a side facing the combustion chamber.
10. A combustion chamber (100) for a rocket engine (10) with a combustion chamber section (110) according to one of claims 1 to 9.
11. A rocket engine (10) with a combustion chamber section (110) according to one of claims 1 to 9 or with a combustion chamber (100) according to claim 10.
12. A method of manufacturing a combustion chamber section (110) according to any one of claims 1 to 9, wherein the combustion chamber section (110) is built up by an additive layer manufacturing technique, wherein at positions where the coolant channels (130) of the combustion chamber body (120) and the at least one coolant channel (133-135) of the baffle (140) are located, no material is joined by the additive layer manufacturing technique.
13. A computer-readable medium comprising instructions which, when executed on a processor, cause a machine to perform the additive layer manufacturing process according to claim 12.

Images